package com.qd.flow.service.bill;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.cdqidi.constant.ConstantDto;
import com.cdqidi.db.BaseService;
import com.cdqidi.dto.CacheKey;
import com.cdqidi.exception.ApiException;
import com.cdqidi.util.RedisTemplateUtil;
import com.qd.common.flow.domain.bill.FlowTaskDTO;
import com.qd.flow.model.bill.FlowTask;
import com.qd.flow.mapper.bill.FlowTaskMapper;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Optional;

import static java.util.stream.Collectors.toList;

/**
 * 审批任务
 *
 * @author sjk
 */
@RequiredArgsConstructor
@Service
@Slf4j
public class FlowTaskService extends BaseService<FlowTaskMapper, FlowTask> {

    private static final String PREFIX_ID = "flow_task_taskId_{0}";

    private final RedisTemplateUtil<FlowTask> redisTemplateUtil;

    /**
     * 保存
     *
     * @param dto 页面对象
     * @return 页面对象
     */
    @Transactional(rollbackFor = Exception.class)
    public FlowTaskDTO save(FlowTaskDTO dto) {
        final FlowTask model = dtoToModel(dto);
        try {
            if (super.save(model)) {
                return modelToDto(model);
            }
            throw new ApiException("添加失败");
        } finally {
            clearCache(model);
            model.freeData();
        }
    }

    /**
     * 修改
     *
     * @param dto 页面对象
     * @return 页面对象
     */
    @Transactional(rollbackFor = Exception.class)
    public FlowTaskDTO update(FlowTaskDTO dto) {
        final FlowTask historyModel = Optional.ofNullable(getById(dto.getTaskId())).orElseThrow(() -> new ApiException("ID不存在,不能更新"));
        final FlowTask model = dtoToModel(dto);
        try{
            if (super.updateById(model)) {
                return modelToDto(model);
            }
            throw new ApiException("更新失败");
        }finally {
            clearCache(historyModel);
            historyModel.freeData();
            model.freeData();
        }
    }

    /**
     * 批量添加
     *
     * @param mList 数据库对象
     */
    @Transactional(rollbackFor = Exception.class)
    public void saveBatch(List<FlowTask> mList) {
        try {
            if (!super.saveBatch(mList)) {
                throw new ApiException("批量添加失败");
            }
        } finally {
            clearCaches(mList);
        }
    }

    /**
     * 批量更新
     *
     * @param mList 数据库对象
     */
    @Transactional(rollbackFor = Exception.class)
    public void updateBatchIds(List<FlowTask> mList) {
        final List<String> ids = mList.stream().map(FlowTask::getTaskId).collect(toList());
        final List<FlowTask> historyModelList = checkIds(ids);
        try {
            if (!super.updateBatchById(mList)) {
                throw new ApiException("批量更新失败");
            }
        } finally {
            clearCaches(historyModelList);
            historyModelList.clear();
            ids.clear();
        }
    }

    /**
     * 删除，单个
     *
     * @param taskId 主键 
     */
    @Transactional(rollbackFor = Exception.class)
    public void removeById(String taskId) {
        final FlowTask historyModel = Optional.ofNullable(getById(taskId)).orElseThrow(() -> new ApiException("数据不存在,不能删除"));
        try {
            if (!super.removeById(taskId)) {
                throw new ApiException("删除失败");
            }
        } finally {
            clearCache(historyModel);
            historyModel.freeData();
        }
    }

    /**
     * 批量删除
     *
     * @param ids 主键集合
     */
    public void removeBatchIds(List<String> ids) {
        final List<FlowTask> historyModelList = checkIds(ids);
        try {
            if (!super.removeByIds(ids)) {
                throw new ApiException("批量删除失败");
            }
        } finally {
            clearCaches(historyModelList);
            historyModelList.clear();
        }
    }

    /**
     * 根据传入对象构建查询参数，判断是否存在
     *
     * @param dto 参数
     * @return 存在为true
     */
    @Transactional(readOnly = true)
    public Boolean isExists(FlowTaskDTO dto) {
        final QueryWrapper<FlowTask> queryWrapper = createQueryWrapper(dto);
        final boolean exists = super.count(queryWrapper) > 0;
        queryWrapper.clear();
        return exists;
    }

    /**
     * 根据主键判断数据是否存在
     *
     * @param taskId 主键 
     * @return 存在为true
     */
    @Transactional(readOnly = true)
    public Boolean isExistsById(String taskId) {
        boolean exists = false;
        if (StringUtils.hasLength(taskId)) {
            final FlowTask model = getById(taskId);
            exists = (null != model);
            if (exists) {
                model.freeData();
            }
        }
        return exists;
    }

    /**
     * 根据主键获取数据
     *
     * @param taskId 主键 
     * @return 单条记录
     */
    public FlowTask getById(String taskId) {
        final String key = RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, taskId);
        return redisTemplateUtil.get(new CacheKey().setKey(key).setTimeout(ConstantDto.REDIS_TIME_OUT_DAY), () -> super.getById(taskId), FlowTask.class);
    }

    /**
     * 根据主键获取数据
     *
     * @param taskId 主键 
     * @return 单条记录，转换成页面对象
     */
    @Transactional(readOnly = true)
    public FlowTaskDTO getByIdDto(String taskId) {
        return Optional.ofNullable(getById(taskId)).map(this::modelToDto).orElse(null);
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录
     */
    public FlowTask getOne(FlowTaskDTO dto) {
        final QueryWrapper<FlowTask> queryWrapper = createQueryWrapper(dto);
        FlowTask model = super.getOne(queryWrapper);
        queryWrapper.clear();
        return model;
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录，转换成页面对象
     */
    @Transactional(readOnly = true)
    public FlowTaskDTO getOneDto(FlowTaskDTO dto) {
        return Optional.ofNullable(getOne(dto)).map(this::modelToDto).orElse(null);
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据
     */
    public List<FlowTask> getList(FlowTaskDTO dto) {
        final QueryWrapper<FlowTask> queryWrapper = createQueryWrapper(dto);
        final List<FlowTask> list = super.list(queryWrapper);
        queryWrapper.clear();
        return list;
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据，转换成页面对象
     */
    @Transactional(readOnly = true)
    public List<FlowTaskDTO> getListDto(FlowTaskDTO dto) {
        return modelToDtoList(getList(dto));
    }

    /**
     * 分页数据
     *
     * @param page 分页对象
     * @param dto  查询参数
     * @return 分页信息
     */
    @Transactional(readOnly = true)
    public IPage<FlowTaskDTO> page(Page<FlowTask> page, FlowTaskDTO dto) {
        final QueryWrapper<FlowTask> queryWrapper = createQueryWrapper(dto, "t1.");
        final IPage<FlowTaskDTO> iPage = baseMapper.page(page, queryWrapper);
        Optional.ofNullable(iPage.getRecords()).ifPresent(l-> l.forEach(this::buildDisplay));
        queryWrapper.clear();
        return iPage;
    }

    /**
     * 清空缓存
     *
     * @param model 数据库对象
     */
    public void clearCache(FlowTask model) {
        if (null == model) {
            return;
        }
        redisTemplateUtil.deleteByKey(RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, model.getTaskId()));
    }

    /**
     * 批量清空缓存
     *
     * @param list 数据库对象
     */
    public void clearCaches(List<FlowTask> list) {
        if (null == list || list.isEmpty()) {
            return;
        }
        List<String> ids = list.stream().map(model -> RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, model.getTaskId())).collect(toList());
        if (!ids.isEmpty()) {
            redisTemplateUtil.deleteByKey(ids);
            ids.clear();
        }
    }

    /**
     * 数据库对象转页面对象
     *
     * @param model 数据库对象
     * @return 页面对象
     */
    public FlowTaskDTO modelToDto(FlowTask model) {
        if (null == model) {
            return null;
        }
        final FlowTaskDTO dto = new FlowTaskDTO();
        dto.setTaskId(model.getTaskId());
        dto.setCreateTime(model.getCreateTime());
        dto.setNodeName(model.getNodeName());
        dto.setApprovalName(model.getApprovalName());
        dto.setApprovalOrgName(model.getApprovalOrgName());
        dto.setApprovalDepartName(model.getApprovalDepartName());
        dto.setBillId(model.getBillId());
        dto.setApprovalOrg(model.getApprovalOrg());
        dto.setApproval(model.getApproval());
        dto.setApprovalDepart(model.getApprovalDepart());
        dto.setNodeId(model.getNodeId());
        dto.setProcessId(model.getProcessId());
        buildDisplay(dto);
        return dto;
    }

    /**
     * 页面对象转数据库对象
     *
     * @param dto 页面对象
     * @return 数据库对象
     */
    public FlowTask dtoToModel(FlowTaskDTO dto) {
        if (null == dto) {
            return null;
        }
        final FlowTask model = new FlowTask();
        model.setTaskId(dto.getTaskId());
        model.setCreateTime(dto.getCreateTime());
        model.setNodeName(dto.getNodeName());
        model.setApprovalName(dto.getApprovalName());
        model.setApprovalOrgName(dto.getApprovalOrgName());
        model.setApprovalDepartName(dto.getApprovalDepartName());
        model.setBillId(dto.getBillId());
        model.setApprovalOrg(dto.getApprovalOrg());
        model.setApproval(dto.getApproval());
        model.setApprovalDepart(dto.getApprovalDepart());
        model.setNodeId(dto.getNodeId());
        model.setProcessId(dto.getProcessId());
        return model;
    }

    /**
     * 码表转换
     *
     * @param dto 页面对象
     */
    public void buildDisplay(FlowTaskDTO dto) {

    }

    /**
     * 数据库对象转页面对象
     *
     * @param list 数据库对象
     * @return 页面对象
     */
    public List<FlowTaskDTO> modelToDtoList(List<FlowTask> list) {
        return Optional.ofNullable(list).orElse(Collections.emptyList()).stream().map(this::modelToDto).collect(toList());
    }

    /**
     * 页面对象转数据库对象
     *
     * @param list 页面对象
     * @return 数据库对象
     */
    public List<FlowTask> dtoToModelList(List<FlowTaskDTO> list) {
        return Optional.ofNullable(list).orElse(Collections.emptyList()).stream().map(this::dtoToModel).collect(toList());
    }

    /**
     * 拼装查询参数，除了主键的其他字段会自动加入进来
     *
     * @param dto 查询参数，不为空的属性会被自动加入
     */
    public QueryWrapper<FlowTask> createQueryWrapper(FlowTaskDTO dto) {
        return createQueryWrapper(dto, "");
    }

    /**
     * 拼装查询参数，除了主键的其他字段会自动加入进来
     *
     * @param dto        查询参数，不为空的属性会被自动加入
     * @param tableAlias 表别名
     */
    public QueryWrapper<FlowTask> createQueryWrapper(FlowTaskDTO dto, String tableAlias) {
        final QueryWrapper<FlowTask> queryWrapper = new QueryWrapper<>();
        if (null != dto) {
            if (StringUtils.hasLength(tableAlias) && tableAlias.charAt(tableAlias.length() - 1) != '.') {
                tableAlias += ".";
            }
            if (StringUtils.hasLength(dto.getNodeName())) {
                queryWrapper.eq(tableAlias + "node_name", dto.getNodeName());
            }
            if (StringUtils.hasLength(dto.getApprovalDepartName())) {
                queryWrapper.eq(tableAlias + "approval_depart_name", dto.getApprovalDepartName());
            }
            if (StringUtils.hasLength(dto.getBillId())) {
                queryWrapper.eq(tableAlias + "bill_id", dto.getBillId());
            }
            if (StringUtils.hasLength(dto.getApprovalDepart())) {
                queryWrapper.eq(tableAlias + "approval_depart", dto.getApprovalDepart());
            }
            if (StringUtils.hasLength(dto.getNodeId())) {
                queryWrapper.eq(tableAlias + "node_id", dto.getNodeId());
            }
            if (StringUtils.hasLength(dto.getProcessId())) {
                queryWrapper.eq(tableAlias + "process_id", dto.getProcessId());
            }
        }
        return queryWrapper;
    }

    /**
     * 批量检查主键在数据库中是否存在
     *
     * @param ids 主键集合
     * @return 主键查询出来的集合
     */
    public List<FlowTask> checkIds(List<String> ids) {
        if (null == ids || ids.isEmpty()) {
            throw new ApiException("ids不能为空");
        }
        final List<FlowTask> list = super.listByIds(ids);
        if (list.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(ids.toArray()));
        }
        if (ids.size() == list.size()) {
            return list;
        }
        List<String> dbIds = list.stream().map(FlowTask::getTaskId).collect(toList());
        final List<String> notExistsList = ids.stream().filter(id -> !dbIds.contains(id)).collect(toList());
        dbIds.clear();
        if (!notExistsList.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(notExistsList.toArray()));
        }
        return list;
    }

    public List<FlowTask> getListByBillId(String billId) {
        final QueryWrapper<FlowTask> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("bill_id", billId);
        List<FlowTask> list = super.list(queryWrapper);
        queryWrapper.clear();
        return list;
    }

    @Transactional(rollbackFor = Exception.class)
    public void removeByBillId(String billId) {
        List<FlowTask> list = getListByBillId(billId);
        if (!list.isEmpty()) {
            removeBatchIds(list.stream().map(FlowTask::getTaskId).collect(toList()));
        }
    }
}